Cast any other instant and/or sorcery spell, or wait for an opponent to cast one.
Holding priority, cast Dual Strike by paying {R}{R}, copying the next instant or sorcery spell you cast with mana value four or less.
Cast Insidious Will by paying {2}{U}{U}, targeting the instant or sorcery spell cast in step 1.
Dual Strike triggers, copying Insidious Will, with the copy targeting the original Insidious Will.
Resolve the copy of Insidious Will, copying Insidious Will, with the copy targeting the original Insidious Will.
Repeat step 5.

Infinite magecraft triggers

Dual Strike

Insidious Will

Cast the additional sorcery by paying its mana cost.
Alania triggers; choose not to have an opponent draw a card.
Holding priority, cast Insidious Will by paying {2}{U}{U}, targeting the additional sorcery.
Alania triggers, causing an opponent to draw a card and you to copy Insidious Will, with the copy targeting the original Insidious Will.
Resolve the copy of Insidious Will, copying the original Insidious Will, with the copy targeting the original Insidious Will.
Repeat step 5.

Combos with "Insidious Will"